Steam engine



Dec. 16, 1930. H. G. MU'ELLER' 1,785,455

STEAM ENGINE .Fild Sept. 7, 1925 s Sheets-Sheet 1 Dec. 16, 1930.

F'ile d Sept. 7, 1923 5 Sheets-Sheet 2 Dec. 16, 1930. H. G. MUELLER STEAM ENGINE 5 Sheets-Sheec 3 v Mm X hm T? w A 52253 Fil'ed Sept. 7, 1925 Patented Dec. 16, 1930 UNI-TED Mam: m 1 I HERMANG. MUELLER, or fimrn, rnNNsYnvA n, AssieNoiwro SKINNEB' EN INE COMPANY, or new, PENNSYLVANIA, A ooRPoaA'rre or PE NsYL'VA IA: f'

1 T EAM E GINE I Application filed s eptember 7,1923. ser'ia1 No.ee1, 341.g l

The inventionis designed tosimplify valve and valve gears now in use and tqv obviate many of the .difiiculties to vvhichsteam engine valves and their gears are now'subject. In carrying out my invention, I j nount valves at opposite ends of the cylinder on.seat members'and oscillate these valves. ;,The valve 2 the engine cylinder,

seat members onvvhichthe valves are operated, are formed perfectly movable so that the Wear, ofthe valves may bereadily taken up. w The valve 1Satfmembers are all so arranged as to be 'subj acted to: comparatively uniformsteam temperatures, so.that distortion of the seat surfaces is avoided. The exhaust valve is carried by and oscillated by the same shaft. as the valves.- Invention also contemplates a preferable valve'gearfor actuating this valve mechanism, as Wellas other details and features vvich will appear from the specification andclaims.

The-iinventionis illustrated in the accoin ;pany1ng drawings, as follovvsze;

s Fig. lshovvs-a plan vievvof theengine.

' Fig.2 a side elevation of the engine."- j

Fig. 3 a section oiithe cylinder and valve on the line 33 in Fig. 4;. "H a Fig. 4 a section on the line Hin Fig. 3. Fig. 5 an end view of one of theyalves. Fig. 6 an end view of one of the Valve seat members.

, Fig. 7 an enlargedsectionontheline inFigs.5and6. Fig. 8 a sectionon theline ;8 f8 in Fig. 7 Fig. 9 a section on theline 9--9 in Fig. "7. Fig. ,10 is an-end viewof'the valve and valve seat member showing the valve seat member adjustingmechanism, 1 marks'the engine-frame.

3 the piston operating. cylinder, the

. piston being of'elongated uniform type; 1

4, a plStOILI'Od extencling fromlthe piston. 5, a crank shaft operated: from the piston in the usual mannerw v The cylinder heads 6 form the steam chests 7 and'steam' is delivered .to these chests through the pipes 7 a. Each chest has avalve seat membersocket 8 extending 'from it -and ports 9 lead from the sockets tothe end of the cylinder. 1

jinder.

An' exhaust valve chestflO airangea bel tvveenthe sockets Sand at the sideof the cylv This chest is connected by. ports 11 With the engine cylinder and by. ports 12 With anjexhaust passage 13, the exhaust passage leading toan exhaust pipelm. i The valve seat member 14 has an. annular .Way 15 around it connected with aniannular passageilG, Which-is in the Walls of the valve seat member socket .and this passage 16- comvmunicates With the port 9. 'Ways 17 extend through'the valve seat member to the ay- 15,

"this, being symmetrically arranged around the valve member. As shovvnthere arethree tion' .vvith Ways 17 asthe {valve is oscillated into the valvechest and has its axis parallel With the axis of the cylinder. f The shaft extends through the gland 2 2' and; is mounted .in boxes 23 on the engine frame i p p f The valve seatmember is movable. endwise' in its socketand-a spring 24 iscoiled; around the inner end ofthe valve seat member. and

rests against a plate 25 at the end of the ex haust chest. This spring yieldinglyholds the valve seat member in seating contact With the valve andtakes up Whatever Wear there 'maybein the valve. The valve may be made asnearly balanced as desired by making the soeket8 larger or 'smallerrelatiVely to the outer diameter of the valve and valve'seat'; .fjmember. "As-"shown this socket is nearly as large as thelarger portion oft'hevalve seat member and consequently the excess'area'of thevalve seat member being slight, tllQPI'QS- sure of the valve due to steam is 'quite'small. Itvvill be understood that this should be sufi cient to at least balance the pressure on the valve" seat member? as exerted throughi'the ways 20 when the valveis closed. .i

' The valve seat member and valve have two- (to openi and close thevalvesp- The valye is fixed on an oscillating shaft 21 which; extends distinct tapers 26 and 27. These surfaces movement and thrust gives a miform I wearing friction.

In order to adjust the timing of the valve, I have provided the following mechanism.

. The pin 28 is securedin the. valve 'seat member and is engaged by a' yoke29 (see Fig. 10) Screw 33 extends through the yoke and has a head 34 which issecured in. a socket by cap'35. The screw'has ajstemwhich extends througha gland 36c; of a packing 36 and is provided with a' sopuare end 37 by i that the walls are exposed entirely around 5 .30

I tions, is very largely avoided. Exhaust valve is provided with the ways 40which opcrate over the ports 11 and areproperly positioned to time theexhaust as desired. A

means of which the screw may be operated.

It' can readily be seen thatby turningthe screw, the valve seat member may be adjusted to give the proper timingiand'the valve at each end of the cylinder maybe operated independently and while the engine is in mo tion. The valve may belubricated by any lubricating system not shown, preferably de- Jlivering oil to asmall groove 19a between the valve and the valve seat member. It will be observed that the valve seat member as well as" the valve project into the steam chest so the valve to uniform steam temperature, and thus distortion, due to temperature variavalve 38 is cylindrically shaped and keyed on the shaft 21 utilizing the same keys 210 as is used for locking the valves. The exhaust series of ways communicatewith the exhaust passages or ports'12, leadingto the exhaust passage 13. The exhaust valve as will be observed, is thus oscillated inunison with the steam valve andby the same mechanism.

A rock arm 42' is fixed on the shaft 21 near the crank shaftend and is provided with a ball 43 forming a ball-joint with a link 44.

The link 44 operates with the ball 45 onarm 46. The 'arm' 46 extendsfrom an eccentric V strap 47 arranged on'the eccentric 48 hung on a' pin 48a controlled by a governor (not shown). A pin l8?) extends from the 'eccentrio strap at the side opposite the pin 46"and terminates in a ball 49a. A link A9 extends from the ball 4.9a tov a ball 50 mountedon. a

post or stud 51 secure to the frame. Thecen- .tral rod 52 of thelink may be'adjustable if desired and, locked in adjustment by jam .nuts53. 1.

- What I claim as new is Y 1. In a steam engine, the combination of a cylinder having steam ports at its ends; valve seats, said seats having cylindrical extensions throughwhichsaid ports extend; packing rings on the extensionsv ateach side of .cylinder'. having a steam port leading, thereto; a valvesejat havinga cylindricalextension'thr'ough which said port extends; packingringson the extension oneach side of the port; a-tapered valve'operating on said seat; and means for oscillating the valve.

3; In a steam engine, the combination of a cylinder having inlet steam ports; valve seat members through vlwhich the ports extend; a rotatable lay shaft paralleltothe axis of the cylinder; opposed inlet valves 'on the shaft controlling saidports and an exhaustvalve carried by the'shaft between theinlet valves. '4. In a steam engine, the combination of a cylinder having ports leading'to its ends; steam chests at the ends of the cylinder; inlet valve seat members through'which the ports extend, said members having free ends projecting into the steam chest in position to be surrounded by steam in-the chest and rotatable valves operating on said members, said valves and members having their axes parallel to the axis of the cylinder.-

5. In a steam engine, the combination of a cylinder having ports leading to its ends; steam chests at the ends 'of the cylinder; in-

let valve seatmembers through which the ports extend, said members having free ends projecting into the steam chests in position to be surrounded by steam in thechests and tapered rotatable valves operating on said members, said valves and membersv having their 'axesfparallel to the axis'of the cylinder. 6. Ina steam-engine,the combination of a cylinder having ports leading to its'ends; an

the shaft seating on said valve seat members.

independently and means for rotating the members to time the valves. i V a 7. In a steam engine, the combination of -a cylinder; a normally stationary valve seat member having a cylindrical extensionv with a port leading to the cylinder; closure rings at each side of the port; a rotatable valve operating on said seat and means for rotating the seat member to time the valve.- 8. Ina steam engine, the'combination of a cylinder; at normallystationary valve seat member having a cylindrical extension with fa port leading to the cylinder closure rings at each side of the port; a valve operating onsaid seat and means for rotating the seat member to. time the valve comprising a screw havingv an exposed stempermitting the adjustingj-during the operation'of the engine.

. 7 9.5111 ,asteamengine, the'co'mbination of a cylinder having a steam'chest with a port leading to the cylinder the port leading from p a cylindrical socket extending from the'chest;

a valve seat member havinga cylindrical extension arranged in the socket with 'Ways leading to the port, the valve seat member being movable axially; a rotatable valve-operating on the member, said member having a diameter proportioned to the diameter of the extension to approximately balance the rotatable valve. i I

10. I11 a steam' engine, the combination of a cylinder having a port leading thereto;

a steam chest having a socket extension; the valve seat member having'a' cylindrical extension in the socket; a rotatable valve op erating on the valve seat member; a spring operating on the valve seat member and yieldingly forcing the same into contact with the valve.

In'testimony whereof, I have hereunto set my hand. HERMAN G. MUELLER. 

